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authorMike Miller <mike.miller@hp.com>2006-01-08 01:03:50 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-08 20:14:00 -0800
commitfb86a35b9ded8a7e53a432cbf28df603cdd4849c (patch)
tree6cfc9de386c26f5b1c9a126aee2bdc8f80bc8e2b /drivers/block/cciss_scsi.c
parentd09cf7d77f62f6fb2f6d63fe5980583805f2d559 (diff)
downloadop-kernel-dev-fb86a35b9ded8a7e53a432cbf28df603cdd4849c.zip
op-kernel-dev-fb86a35b9ded8a7e53a432cbf28df603cdd4849c.tar.gz
[PATCH] cciss: adds MSI and MSI-X support
This creates a new function, cciss_interrupt_mode called from cciss_pci_init. This function determines what type of interrupt vector to use, i.e., MSI, MSI-X, or IO-APIC. One noticeable difference is changing the interrupt field of the controller struct to an array of 4 unsigned ints. The Smart Array HW is capable of generating 4 distinct interrupts depending on the transport method in use during operation. These are: #define DOORBELL_INT 0 Used to notify the contoller of configuration updates. We only use this feature when in polling mode. #define PERF_MODE_INT 0 Used when the controller is in Performant Mode. #define SIMPLE_MODE_INT 2 Used when the controller is in Simple Mode (current Linux implementation). #define MEMQ_INT_MODE 3 Not used. When using IO-APIC interrupts these 4 lines are OR'ed together so when any one fires an interrupt an is generated. In MSI or MSI-X mode this hardware OR'ing is ignored. We must register for our interrupt depending on what mode the controller is running. For Linux we use SIMPLE_MODE_INT exclusively at this time. Please consider this for inclusion. Signed-off-by: Mike Miller <mike.miller@hp.com> Cc: Jens Axboe <axboe@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/block/cciss_scsi.c')
-rw-r--r--drivers/block/cciss_scsi.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/block/cciss_scsi.c b/drivers/block/cciss_scsi.c
index 2942d32..9e35de0 100644
--- a/drivers/block/cciss_scsi.c
+++ b/drivers/block/cciss_scsi.c
@@ -714,7 +714,7 @@ cciss_scsi_detect(int ctlr)
((struct cciss_scsi_adapter_data_t *)
hba[ctlr]->scsi_ctlr)->scsi_host = (void *) sh;
sh->hostdata[0] = (unsigned long) hba[ctlr];
- sh->irq = hba[ctlr]->intr;
+ sh->irq = hba[ctlr]->intr[SIMPLE_MODE_INT];
sh->unique_id = sh->irq;
error = scsi_add_host(sh, &hba[ctlr]->pdev->dev);
if (error)
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